Threshing bars with reinforced spikes and cutting blades

Abstract

A threshing bar includes a threshing fixture formed entirely of a first metal, and a head formed entirely of a second metal. The threshing fixture includes a leading extremity, a trailing extremity, a top threshing side, a bottom threshing drum emplacement side, and a spike. The spike projects from the top threshing side to the head affixed rigidly to the spike and which is available for threshing crop cuttings between the leading and trailing extremities. The first metal has a first tensile strength, the second metal has a second tensile strength, and the second tensile strength is greater than the first tensile strength.

Having fully described the invention in such clear and concise terms as to enable those skilled in the art to understand and practice the same, the invention claimed is: 
     
       1. A threshing bar, comprising:
 a threshing fixture, formed entirely of a first metal, includes a leading extremity, a trailing extremity, a top threshing side, a bottom threshing drum emplacement side, a trailing threshing face, and a spike that is sharpened to a first cutting edge, the spike projects outwardly from the top threshing side to a top of the spike, the spike includes opposite sides that taper forwardly toward the leading extremity to the first cutting edge between the leading and trailing extremities and that projects outwardly from the trailing threshing face to the top of the spike; 
 a head, formed entirely of a second metal, sharpened to a second cutting edge, the head is affixed rigidly to one of the opposed sides of the spike, the head extends forwardly along the one of the opposed sides of the spike toward the leading extremity to the second cutting edge between the leading and trailing extremities; 
 the second cutting edge merges with first cutting edge, and the first cutting edge and second cutting edge are coextensive, concurrently project outwardly from the trailing threshing face to the top of the spike, and cooperate to form an aggressive cutting edge, the spike further leads with the aggressive cutting edge that is between the leading and trailing extremities and that extends outwardly from the trailing threshing face to the top of the spike for cutting crop cuttings between the leading and trailing extremities; 
 the first metal has a first tensile strength; 
 the second metal is different from the first metal and has a second tensile strength; and 
 the second tensile strength is greater than the first tensile strength. 
 
     
     
       2. The threshing bar according to  claim 1 , wherein the head is fitted into a notch formed in the one of the opposed sides of the spike. 
     
     
       3. The threshing bar according to  claim 1 , wherein the first metal is cast iron. 
     
     
       4. The threshing bar according to  claim 3 , wherein the second metal is tungsten carbide.